采用野外调查和室内分析相结合的方法,以喀斯特峰丛洼地森林土壤为研究对象,就土壤各粒径团聚体中有机碳和微生物量碳的分布特征进行了研究,以期反映森林类型对土壤团聚体及其养分循环的影响,为喀斯特地区植被恢复和生态重建的实施提供依据。结果表明:各森林土壤均以>2 mm大粒径团聚体为主,占总团聚体的60%-80%。原生林土壤各粒径团聚体平均有机碳含量较次生林、人工林分别高出48.11%和61.24%,次生林较人工林高出25.29%。各粒径团聚体微生物量碳含量原生林较次生林、人工林分别高出18.13%和42.60%,次生林较人工林高出29.89%。各粒径土壤团聚体微生物熵介于0.26%-1.00%,除桉树林外,土壤各粒径团聚体微生物熵随着森林发展阶段的递进而降低。减少人为干扰有利于喀斯特地区森林土壤碳的固定和积累。团聚体粒径对团聚体中有机碳和微生物量碳的含量影响不显著。侧柏林和枫香林土壤团聚体中有机碳和微生物量碳较其他3种森林土壤的丰富,且微生物熵较低,是喀斯特地区植被恢复和生态重建的适宜树种。 The field survey and indoor analysis were used to study the distribution characteristics of soil organic carbon and microbial biomass carbon in the forest soil in the karst peak cluster depression so as to reflect the effect of forest type on the soil aggregation Body and its nutrient cycle, provide the basis for the implementation of vegetation restoration and ecological restoration in karst areas. The results showed that all the forest soils were dominated by> 2 mm aggregates, accounting for 60% -80% of the total aggregates. Compared with the secondary and afforestation forests, the average organic carbon content of the primary aggregates was 48.11% and 61.24% higher than that of the secondary and afforestation forests, respectively, and the secondary forest was 25.29% higher than that of the plantations. Compared with the secondary forest and the plantation forest, the primary carboniferous forest biomass of the aggregates with various particle size was 18.13% and 42.60% higher than the secondary forest and the plantation forest respectively, and the secondary forest was 29.89% higher than the plantation forest. The soil microbial biomass entropy ranged from 0.26% to 1.00%. The soil microbial biomass entropy decreased with the progress of forest development except for Eucalyptus forest. Reducing anthropogenic disturbance is beneficial to the fixation and accumulation of soil carbon in the forest in karst areas. Aggregate particle size had no significant effect on the content of organic carbon and microbial biomass carbon in the aggregates. The contents of soil organic carbon and microbial biomass carbon in the soil aggregates were higher than those in the other three kinds of forest soils, and the microbial entropy was low, which was the suitable tree species for vegetation restoration and ecological restoration in karst area.